The Ukrainian athlete who was ordered to give back her discus gold medal because of a scoring blunder did not turn up to the rearranged ceremony at the Olympic Stadium on Monday morning.

Mariia Pomazan, 23, stayed away in an apparent protest as the gold she had been presented with on Friday was awarded to China's Wu Qing. The International Paralympic Committee has formally requested that Pomazan return the gold medal she was mistakenly awarded.

Pomazan was demoted to silver and the place on the podium reserved for the second-placed athlete remained empty. Australia's Katherine Proudfoot, initially given fifth place, was upgraded to bronze.

The 23-year-old admitted on Sunday she was "very, very angry" about losing her gold in the F35/36 class, after organisers announced the wrong medals had been awarded, and that those feelings had been behind her winning shot put gold two days later. Points rather than distance determined the final standings in the combined class event. The distances are converted into points to account for the different impairments of the athletes taking part.

All three athletes who received medals on Friday were asked to return them, with an appeal by the Ukrainian National Paralympic Committee for the original result to stand rejected by the jury of appeal.

The IPC communications director, Craig Spence, said: "We have tried our hardest since Friday, when the error occurred, to try to find a solution with both the Chinese and the Ukrainians. There has been a lot of negotiation. We have struggled and failed to reach a conclusion that suits all parties.

"Therefore we have to go with the rule book. The Chinese athlete will take the gold medal, the Ukrainian athlete will take silver and the Australian athlete will take bronze.

"We will ask the three medallists who received their medals on Friday, when the wrong result was announced, to hand back those medals. We have made a request."

The IPC and London 2012 organising committee have a medal contingency, meaning they will not be short of medals even if Pomazan ignores their request. The confusion was caused by a flaw in Omega's scoring system.

The London 2012 director of communications and public affairs, Jackie Brock-Doyle, said: "We would have preferred that not to happen. We clearly have also apologised to the athletes."